CRUSTACEA. 



Cyktopia rostrata. 



Carapax bene acutique rostralus, rostra oculis non ireviore, margins carets 

 pack infero-laterali acute uni-dentigero, postico rotunduto. tegmentum 

 abdominis ultimum extremitate subito angustatum apiceque rotum, 

 datum et minuti epinulomm, ad basin setarum subapicalium spind 

 armatum; setis (vel barbie) longis apicem valde superantibus, divari- 

 catis. Lamella eaudales subwquce, segmento caudali valde breviores. 



Carapax with an acute beak rather long (as long as the eyes), bearin- 

 an acute tooth somewhat posteriorly on the lateral margin, rounded 

 behind. Last abdominal segment abruptly narrowed at extremity 

 and the small apex rounded and set divergently with spinules- a 

 spine also at outer base of subapical set*; these subapical sete 

 extending much beyond the apex of the caudal segment and diver- 

 gent. Caudal lamella) subequal, very much shorter than the caudal 

 segment. 



Plate 43, fig. 2 a, animal, enlarged; b, caudal extremity. 



^Pacific, Kingsmills Group, near Pitt's Island. Collected, April 30, 



andrcS'°Th hird0fan - inCh - C0l °" rleSS - T te beak is quite long 



Theci , 1 The il CaraPa V S ^ 6XCaVate **** ™ the dorsum 

 The oauda lamella; are about three-fourths as long as caudal segment, 



and the sete projecting and divergent give it a sagittate appearance 

 These a** , or setiform processes extend full half Seir length beyond 

 the apex of the segment; and there is a spine on each side of the seg- 

 ment just exterior to base of sete. The eyes are gibbous and look t 

 if a mass had been protruded laterally by pressure. The le-Tw Je 

 imperfect ; on y one pair was elongated, as seen in the figure 



The base of the inner antenna, is about three times as Ion. as the 

 eyes First joint nearly two-thirds the length of the whole" third 

 joint a little longer than the second Anov Ze fi,. f • • 4 , ' , 

 far as 1W y nf Z^t sec °"a- Apex of first joint prolonged as 



irTt apex of Pgme t 5 "^'.** *" t hairS ° n these ^ 

 joints. At apex of base two one-jointed branches, as Ion- each as 



ndt S :2T: f a, :° one or two lon * 1*™ P~ Z 



under side, which are three times as long as the branch. 



